What are terms in other countries that are equivalent to the American "Ivy League" for top tier education?

https://en.wikipedia.org/wiki/Ivy_League

1. Brown
2. Columbia
3. Cornell
4. Dartmouth
5. Harvard
6. Penn
7. Princeton
8. Yale

https://en.wikipedia.org/wiki/C9_League#Members

1. Tsinghua University
2. Peking University
3. Zhejiang University
4. Nanjing University
5. Fudan University
6. Shanghai Jiao Tong University (SJTU)
7. Xi'an Jiaotong University (XJTU)
8. University of Science and Technology of China (USTC)
9. Harbin Institute of Technology (HIT)

https://en.wikipedia.org/wiki/Golden_triangle_(universities)#Rankings

1. University of Cambridge
2. Imperial College London
3. King's College London[note 1]
4. London School of Economics [note 2]
5. University of Oxford
6. University College London

https://en.wikipedia.org/wiki/Imperial_Universities#Members

1. Tohoku University (東北大学)
2. Kyushu University (九州大学)
3. Hokkaido University (北海道大学)
4. Seoul National University (서울대학교)[2]
5. National Taiwan University (國立臺灣大學)[4]
6. Osaka University (大阪大学)
7. Nagoya University (名古屋大学)

https://en.wikipedia.org/wiki/U15_Group_of_Canadian_Research_Universities#Membership

1. University of Alberta
2. University of British Columbia
3. University of Calgary
4. Dalhousie University
5. Université Laval
6. University of Manitoba
7. McGill University
8. McMaster University
9. Université de Montréal
10. University of Ottawa
11. Queen's University
12. University of Saskatchewan
13. University of Toronto
14. University of Waterloo
15. University of Western Ontario

https://en.wikipedia.org/wiki/Group_of_Eight_(Australian_universities)

1. Australian National University
2. Monash University
3. University of Adelaide
4. University of Melbourne
5. University of New South Wales
6. University of Queensland
7. University of Sydney
8. University of Western Australia

https://en.wikipedia.org/wiki/Grandes_%C3%A9coles#Classification_as_Grandes_%C3%89coles